Description

Levothyroxine: Uses, Dosage, Side Effects, and More

Levothyroxine is a commonly prescribed medication used to treat hypothyroidism—a condition where the thyroid gland does not produce enough thyroid hormone. It is a synthetic form of thyroxine (T4), a hormone that regulates the body’s metabolism, energy levels, and overall well-being.

What Is Levothyroxine Used For?

• Hypothyroidism (underactive thyroid)

• Goiter (enlarged thyroid gland)

• Thyroid cancer (as part of treatment)

• Thyroid hormone replacement after surgery or radiation

How Does Levothyroxine Work?

Levothyroxine replaces or supplements the thyroid hormone, restoring normal metabolic activity. It helps regulate body temperature, heart rate, and energy levels, and is essential for proper growth and development.

Common Brand Names

• Synthroid®

• Euthyrox®

• Eltroxin®

• Levoxyl®

• Euthyroxine

Dosage Information

Dosage is individualized based on age, weight, thyroid hormone levels, and medical condition. It’s usually taken once daily, on an empty stomach, 30 to 60 minutes before breakfast.

Note: Never change your dosage without consulting your doctor.

Possible Side Effects

While Levothyroxine is generally safe when taken as prescribed, some people may experience:

• Headache

• Fatigue or insomnia

• Weight changes

• Anxiety or nervousness

• Irregular heartbeat

Seek immediate medical attention if you notice symptoms of overdose, such as chest pain, fast heart rate, or shortness of breath.

Drug Interactions

Levothyroxine can interact with:

• Calcium or iron supplements

• Antacids

• Diabetes medications

• Blood thinners (e.g., warfarin)

Always inform your doctor about all medications and supplements you are taking.

Tips for Taking Levothyroxine

• Take at the same time every day

• Avoid food and other medications for 30-60 minutes after taking it

• Regularly monitor your TSH levels as advised by your doctor

• Do not stop taking Levothyroxine without medical advice

Frequently Asked Questions (FAQs)

Q: How long does it take for Levothyroxine to work?
A: Most people start feeling better within 1 to 2 weeks, but full effects may take 4 to 6 weeks.

Q: Can I lose weight on Levothyroxine?
A: Weight loss may occur if your hypothyroidism caused weight gain. Levothyroxine is not a weight loss drug.

Q: Is it safe during pregnancy?
A: Yes. Maintaining normal thyroid levels is crucial during pregnancy. Your doctor may adjust your dose.